From: Igor Stoppa <igor.stoppa@gmail.com>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>,
Kees Cook <keescook@chromium.org>,
Matthew Wilcox <willy@infradead.org>,
Dave Chinner <david@fromorbit.com>,
James Morris <jmorris@namei.org>,
Michal Hocko <mhocko@kernel.org>,
kernel-hardening@lists.openwall.com,
linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org
Cc: igor.stoppa@huawei.com, Dave Hansen <dave.hansen@linux.intel.com>,
Jonathan Corbet <corbet@lwn.net>,
Laura Abbott <labbott@redhat.com>,
Vlastimil Babka <vbabka@suse.cz>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Pavel Tatashin <pasha.tatashin@oracle.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 05/17] prmem: shorthands for write rare on common types
Date: Wed, 24 Oct 2018 00:34:52 +0300 [thread overview]
Message-ID: <20181023213504.28905-6-igor.stoppa@huawei.com> (raw)
In-Reply-To: <20181023213504.28905-1-igor.stoppa@huawei.com>
Wrappers around the basic write rare functionality, addressing several
common data types found in the kernel, allowing to specify the new
values through immediates, like constants and defines.
Note:
The list is not complete and could be expanded.
Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com>
CC: Michal Hocko <mhocko@kernel.org>
CC: Vlastimil Babka <vbabka@suse.cz>
CC: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Pavel Tatashin <pasha.tatashin@oracle.com>
CC: linux-mm@kvack.org
CC: linux-kernel@vger.kernel.org
---
MAINTAINERS | 1 +
| 133 +++++++++++++++++++++++++++++++++++++
2 files changed, 134 insertions(+)
create mode 100644 include/linux/prmemextra.h
diff --git a/MAINTAINERS b/MAINTAINERS
index e566c5d09faf..df7221eca160 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9459,6 +9459,7 @@ M: Igor Stoppa <igor.stoppa@gmail.com>
L: kernel-hardening@lists.openwall.com
S: Maintained
F: include/linux/prmem.h
+F: include/linux/prmemextra.h
F: mm/prmem.c
MEMORY MANAGEMENT
--git a/include/linux/prmemextra.h b/include/linux/prmemextra.h
new file mode 100644
index 000000000000..36995717720e
--- /dev/null
+++ b/include/linux/prmemextra.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * prmemextra.h: Shorthands for write rare of basic data types
+ *
+ * (C) Copyright 2018 Huawei Technologies Co. Ltd.
+ * Author: Igor Stoppa <igor.stoppa@huawei.com>
+ *
+ */
+
+#ifndef _LINUX_PRMEMEXTRA_H
+#define _LINUX_PRMEMEXTRA_H
+
+#include <linux/prmem.h>
+
+/**
+ * wr_char - alters a char in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_char(const char *dst, const char val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_short - alters a short in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_short(const short *dst, const short val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_ushort - alters an unsigned short in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_ushort(const unsigned short *dst, const unsigned short val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_int - alters an int in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_int(const int *dst, const int val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_uint - alters an unsigned int in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_uint(const unsigned int *dst, const unsigned int val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_long - alters a long in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_long(const long *dst, const long val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_ulong - alters an unsigned long in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_ulong(const unsigned long *dst, const unsigned long val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_longlong - alters a long long in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_longlong(const long long *dst, const long long val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+/**
+ * wr_ulonglong - alters an unsigned long long in write rare memory
+ * @dst: target for write
+ * @val: new value
+ *
+ * Returns true on success, false otherwise.
+ */
+static __always_inline
+bool wr_ulonglong(const unsigned long long *dst,
+ const unsigned long long val)
+{
+ return wr_memcpy(dst, &val, sizeof(val));
+}
+
+#endif
--
2.17.1
next prev parent reply other threads:[~2018-10-23 21:37 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 21:34 [RFC v1 PATCH 00/17] prmem: protected memory Igor Stoppa
2018-10-23 21:34 ` [PATCH 01/17] prmem: linker section for static write rare Igor Stoppa
2018-10-23 21:34 ` [PATCH 02/17] prmem: write rare for static allocation Igor Stoppa
2018-10-25 0:24 ` Dave Hansen
2018-10-29 18:03 ` Igor Stoppa
2018-10-26 9:41 ` Peter Zijlstra
2018-10-29 20:01 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 03/17] prmem: vmalloc support for dynamic allocation Igor Stoppa
2018-10-25 0:26 ` Dave Hansen
2018-10-29 18:07 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 04/17] prmem: " Igor Stoppa
2018-10-23 21:34 ` Igor Stoppa [this message]
2018-10-25 0:28 ` [PATCH 05/17] prmem: shorthands for write rare on common types Dave Hansen
2018-10-29 18:12 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 06/17] prmem: test cases for memory protection Igor Stoppa
2018-10-24 3:27 ` Randy Dunlap
2018-10-24 14:24 ` Igor Stoppa
2018-10-25 16:43 ` Dave Hansen
2018-10-29 18:16 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 07/17] prmem: lkdtm tests " Igor Stoppa
2018-10-23 21:34 ` [PATCH 08/17] prmem: struct page: track vmap_area Igor Stoppa
2018-10-24 3:12 ` Matthew Wilcox
2018-10-24 23:01 ` Igor Stoppa
2018-10-25 2:13 ` Matthew Wilcox
2018-10-29 18:21 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 09/17] prmem: hardened usercopy Igor Stoppa
2018-10-29 11:45 ` Chris von Recklinghausen
2018-10-29 18:24 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 10/17] prmem: documentation Igor Stoppa
2018-10-24 3:48 ` Randy Dunlap
2018-10-24 14:30 ` Igor Stoppa
2018-10-24 23:04 ` Mike Rapoport
2018-10-29 19:05 ` Igor Stoppa
2018-10-26 9:26 ` Peter Zijlstra
2018-10-26 10:20 ` Matthew Wilcox
2018-10-29 19:28 ` Igor Stoppa
2018-10-26 10:46 ` Kees Cook
2018-10-28 18:31 ` Peter Zijlstra
2018-10-29 21:04 ` Igor Stoppa
2018-10-30 15:26 ` Peter Zijlstra
2018-10-30 16:37 ` Kees Cook
2018-10-30 17:06 ` Andy Lutomirski
2018-10-30 17:58 ` Matthew Wilcox
2018-10-30 18:03 ` Dave Hansen
2018-10-31 9:18 ` Peter Zijlstra
2018-10-30 18:28 ` Tycho Andersen
2018-10-30 19:20 ` Matthew Wilcox
2018-10-30 20:43 ` Igor Stoppa
2018-10-30 21:02 ` Andy Lutomirski
2018-10-30 21:07 ` Kees Cook
2018-10-30 21:25 ` Igor Stoppa
2018-10-30 22:15 ` Igor Stoppa
2018-10-31 10:11 ` Peter Zijlstra
2018-10-31 20:38 ` Andy Lutomirski
2018-10-31 20:53 ` Andy Lutomirski
2018-10-31 9:45 ` Peter Zijlstra
2018-10-30 21:35 ` Matthew Wilcox
2018-10-30 21:49 ` Igor Stoppa
2018-10-31 4:41 ` Andy Lutomirski
2018-10-31 9:08 ` Igor Stoppa
2018-10-31 19:38 ` Igor Stoppa
2018-10-31 10:02 ` Peter Zijlstra
2018-10-31 20:36 ` Andy Lutomirski
2018-10-31 21:00 ` Peter Zijlstra
2018-10-31 22:57 ` Andy Lutomirski
2018-10-31 23:10 ` Igor Stoppa
2018-10-31 23:19 ` Andy Lutomirski
2018-10-31 23:26 ` Igor Stoppa
2018-11-01 8:21 ` Thomas Gleixner
2018-11-01 15:58 ` Igor Stoppa
2018-11-01 17:08 ` Peter Zijlstra
2018-10-30 18:51 ` Andy Lutomirski
2018-10-30 19:14 ` Kees Cook
2018-10-30 21:25 ` Matthew Wilcox
2018-10-30 21:55 ` Igor Stoppa
2018-10-30 22:08 ` Matthew Wilcox
2018-10-31 9:29 ` Peter Zijlstra
2018-10-30 23:18 ` Nadav Amit
2018-10-31 9:08 ` Peter Zijlstra
2018-11-01 16:31 ` Nadav Amit
2018-11-02 21:11 ` Nadav Amit
2018-10-31 9:36 ` Peter Zijlstra
2018-10-31 11:33 ` Matthew Wilcox
2018-11-13 14:25 ` Igor Stoppa
2018-11-13 17:16 ` Andy Lutomirski
2018-11-13 17:43 ` Nadav Amit
2018-11-13 17:47 ` Andy Lutomirski
2018-11-13 18:06 ` Nadav Amit
2018-11-13 18:31 ` Igor Stoppa
2018-11-13 18:33 ` Igor Stoppa
2018-11-13 18:36 ` Andy Lutomirski
2018-11-13 19:03 ` Igor Stoppa
2018-11-21 16:34 ` Igor Stoppa
2018-11-21 17:36 ` Nadav Amit
2018-11-21 18:01 ` Igor Stoppa
2018-11-21 18:15 ` Andy Lutomirski
2018-11-22 19:27 ` Igor Stoppa
2018-11-22 20:04 ` Matthew Wilcox
2018-11-22 20:53 ` Andy Lutomirski
2018-12-04 12:34 ` Igor Stoppa
2018-11-13 18:48 ` Andy Lutomirski
2018-11-13 19:35 ` Igor Stoppa
2018-11-13 18:26 ` Igor Stoppa
2018-11-13 18:35 ` Andy Lutomirski
2018-11-13 19:01 ` Igor Stoppa
2018-10-31 9:27 ` Igor Stoppa
2018-10-26 11:09 ` Markus Heiser
2018-10-29 19:35 ` Igor Stoppa
2018-10-26 15:05 ` Jonathan Corbet
2018-10-29 19:38 ` Igor Stoppa
2018-10-29 20:35 ` Igor Stoppa
2018-10-23 21:34 ` [PATCH 11/17] prmem: llist: use designated initializer Igor Stoppa
2018-10-23 21:34 ` [PATCH 12/17] prmem: linked list: set alignment Igor Stoppa
2018-10-26 9:31 ` Peter Zijlstra
2018-10-23 21:35 ` [PATCH 13/17] prmem: linked list: disable layout randomization Igor Stoppa
2018-10-24 13:43 ` Alexey Dobriyan
2018-10-29 19:40 ` Igor Stoppa
2018-10-26 9:32 ` Peter Zijlstra
2018-10-26 10:17 ` Matthew Wilcox
2018-10-30 15:39 ` Peter Zijlstra
2018-10-23 21:35 ` [PATCH 14/17] prmem: llist, hlist, both plain and rcu Igor Stoppa
2018-10-24 11:37 ` Mathieu Desnoyers
2018-10-24 14:03 ` Igor Stoppa
2018-10-24 14:56 ` Tycho Andersen
2018-10-24 22:52 ` Igor Stoppa
2018-10-25 8:11 ` Tycho Andersen
2018-10-28 9:52 ` Steven Rostedt
2018-10-29 19:43 ` Igor Stoppa
2018-10-26 9:38 ` Peter Zijlstra
2018-10-23 21:35 ` [PATCH 15/17] prmem: test cases for prlist and prhlist Igor Stoppa
2018-10-23 21:35 ` [PATCH 16/17] prmem: pratomic-long Igor Stoppa
2018-10-25 0:13 ` Peter Zijlstra
2018-10-29 21:17 ` Igor Stoppa
2018-10-30 15:58 ` Peter Zijlstra
2018-10-30 16:28 ` Will Deacon
2018-10-31 9:10 ` Peter Zijlstra
2018-11-01 3:28 ` Kees Cook
2018-10-23 21:35 ` [PATCH 17/17] prmem: ima: turn the measurements list write rare Igor Stoppa
2018-10-24 23:03 ` [RFC v1 PATCH 00/17] prmem: protected memory Dave Chinner
2018-10-29 19:47 ` Igor Stoppa
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